diff --git a/artiq/artiq-board.nix b/artiq/artiq-board.nix
index 1bf228e..c535154 100644
--- a/artiq/artiq-board.nix
+++ b/artiq/artiq-board.nix
@@ -9,7 +9,7 @@ let
   fetchcargo = import ./fetchcargo.nix {
     inherit (pkgs) stdenv cacert git cargo cargo-vendor;
   };
-  artiqSrc = import ./pkgs/artiq-src.nix;
+  artiqSrc = import ./pkgs/artiq-src.nix { fetchgit = pkgs.fetchgit; };
   cargoDeps = fetchcargo rec {
     name = "artiq-firmware-cargo-deps";
     src = "${artiqSrc}/artiq/firmware";
diff --git a/artiq/pkgs/artiq.nix b/artiq/pkgs/artiq.nix
index ac63e8a..419d9d1 100644
--- a/artiq/pkgs/artiq.nix
+++ b/artiq/pkgs/artiq.nix
@@ -1,4 +1,4 @@
-{ stdenv, git, fetchFromGitHub, python3Packages, qt5Full, binutils-or1k, llvm-or1k, llvmlite, python3 }:
+{ stdenv, git, fetchFromGitHub, fetchgit, python3Packages, qt5Full, binutils-or1k, llvm-or1k, llvmlite, python3 }:
 
 let
 
@@ -65,7 +65,7 @@ in
 
 python3Packages.buildPythonPackage rec {
   name = "artiq";
-  src = import ./artiq-src.nix;
+  src = import ./artiq-src.nix { inherit fetchgit; };
   buildInputs = [ git ];
   propagatedBuildInputs = with python3Packages; [ binutils-or1k llvm-or1k llvmlite levenshtein pyqtgraph-qt5 aiohttp pygit2 pythonparser numpy dateutil quamash scipy prettytable pyserial asyncserial h5py cython regex qt5Full pyqt5 ];
   checkPhase = "python -m unittest discover -v artiq.test";
diff --git a/main.nix b/main.nix
index 1eaff86..287a912 100644
--- a/main.nix
+++ b/main.nix
@@ -1,10 +1,21 @@
 { pkgs ? import <nixpkgs> {}}:
 let
   artiqSrc = builtins.toString <artiqSrc>;
-  generatedNix = pkgs.runCommand "generated-nix" { }
+  generatedNix = pkgs.runCommand "generated-nix" { buildInputs = [ pkgs.nix pkgs.git ]; }
     ''
     cp --no-preserve=mode,ownership -R ${./artiq} $out
-    echo ${artiqSrc} > $out/pkgs/artiq-src.nix
+    REV=`git --git-dir ${artiqSrc}/.git rev-parse HEAD`
+    HASH=`nix-hash --type sha256 --base32 ${artiqSrc}`
+    cat > $out/pkgs/artiq-src.nix << EOF
+    { fetchgit }:
+    fetchgit {
+      url = "git://github.com/m-labs/artiq.git";
+      rev = "$REV";
+      sha256 = "$HASH";
+      deepClone = true;
+      leaveDotGit = true;
+    }
+    EOF
     '';
   artiqPkgs = import "${generatedNix}/default.nix" { inherit pkgs; };
 
@@ -22,7 +33,7 @@ let
       start // {
         "artiq-board-${board.target}-${board.variant}" = boardBinaries;
         "conda-artiq-board-${board.target}-${board.variant}" = import "${generatedNix}/conda-board.nix" { inherit pkgs; } {
-          artiqSrc = import "${generatedNix}/pkgs/artiq-src.nix";
+          artiqSrc = import "${generatedNix}/pkgs/artiq-src.nix" { fetchgit = pkgs.fetchgit; };
           boardBinaries = boardBinaries;
           target = board.target;
           variant = board.variant;
@@ -32,7 +43,7 @@ let
   jobs = {
     conda-artiq = import "${generatedNix}/conda-build.nix" { inherit pkgs; } {
       name = "conda-artiq";
-      src = import "${generatedNix}/pkgs/artiq-src.nix";
+      src = import "${generatedNix}/pkgs/artiq-src.nix" { fetchgit = pkgs.fetchgit; };
       recipe = "conda/artiq";
     };
   } // boardJobs // artiqPkgs;